1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae4f54878a0db9141b842707a69a126e0e789ee78a33a689e70a5035aaeafb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65f0aae6-e29e-4898-9daa-d5ced605a270.json and https://artists.proofprofile.net/proofs/artist/65f0aae6-e29e-4898-9daa-d5ced605a270.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f32b0f49b4813e2d22f4d0d575c7f7107732d4811ef5e3704ae4709f9b471. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7DV1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc9d3bebbd41b83aa56845607e3e26c6d76355f65dc68a6dda75ec0bf1f9180. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7DV1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b013db5b274e6861e708048e1ef5537bf32c0f9e6eda81fc8f13db047e235f8. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7DV1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a8bb81b262ced178855dc88fb244684a3d49ef679b3a1657ea0ee4657f6f8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7DV1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd08d017155c07c711fad2dc1f5d3eeb254bf2b0e63952512664b3e8a8f1e3d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8096623baad71ee753c72557fd6cc15d1489b6fdf89dcc528f9b2f1e91c5fda. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b609d8041c21baf3c48709c961208bcd2ef9302f94dc4f39ff2f996114c21d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49038abc09b4ac0e5e9b4af3a28e5c7ba80c29847137bd8f2dceeadfe95782a3. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5407d940fddb88fd7262134d2ed03fdcc27a7d9598eef4f5fe0a021e70910d8a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95774631dd81a9716033fdc1297cc13b1bfa63eeb931551d2b0df5893bf3dc92. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50891ef5bf7f3af4ee7c0af340db736654beb49d448e6c139a32b354ff640822. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB1810010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa1a01d8b7e0817abf6fcdb85b8c7bf5b58e16c3a61fe54b5b07c014915e86. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEJ1940235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c9a5eafc7863ce7376f65a73ad033028c72ce9462c09b640a593929ec36958. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCSB2100001.
Love At The Five And Dime (feat. Jamie Lin Wilson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4382aaaaea39adc17550099c63d0083e6666f663b8e1130dc462c6a48e89e076. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4AB2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b036f8e9f5e559d3f515564cf15e24a0dfaa36e752cdd80e4676e73fa8fc3d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2762405114.